The issue seems likely to stem from the final step of the authorization sequence, when your web browser attempts to connect to the EasyMorph Desktop — which is listening on the same machine. This is why the address 127.0.0.1 is displayed. The underlying issue appears to be that while the EasyMorph Desktop is ready to receive the incoming connection, your web browser is for some reason unable to connect to it.
Possible causes for this issue could be related to firewall configuration, which can impede the connection. Please look for a list of workarounds and things to try here.